The first question you should ask any roofer is whether they are licensed and insured. http://apicius.net/de-re-coquinaria/%D0%BC%D0%BE%D1%80%D0%B5%D1%82%D0%BE/16-%D1%81%D0%BE%D1%81-%D0%B7%D0%B0-%D0%BB%D0%B0%D0%BD%D0%B3%D1%83%D1%81%D1%82%D0%B8,-%D0%BE%D0%BC%D0%B0%D1%80%D0%B8-%D0%B8-%D1%81%D0%BA%D0%B0%D1%80%D0%B8%D0%B4%D0%B8
